|Play Accordion !|
|Play it !|
|Why 6+6 ?|
And even if You want to stay with the old piano layout, you can play "Travel Piano" with the enhanced pc keyboard and the rest of this argumentation is still valid:
You need less devices for more purposes: The keyboard can write and play.
The "100$-Laptop"-Initiative as well as most music software get dramatically enhanced without having to deal with heavy device "crap".
All children can be educated not only in reading, writing, calculating and talking.
They also get a basic orchestra to their 10 fingers command, which can be much more fun than many other computer games!